What signs indicate nitroglycerin-induced hypotension to monitor for?

• A. Dizziness or lightheadedness, faintness, and decreased blood pressure.
• B. Sudden weight gain and peripheral edema.
• C. Cough and wheeze.
• D. Headache only.

Answer: (A)

Nitroglycerin lowers blood pressure by dilating veins and arteries, which reduces preload and systemic vascular resistance. The most direct signs of this hypotensive effect are dizziness or lightheadedness, faintness, and a drop in blood pressure. These symptoms indicate that cerebral perfusion may be compromised if the medication continues unchanged.

Other options aren’t typical indicators of nitroglycerin-induced hypotension. Sudden weight gain and peripheral edema suggest fluid retention rather than an acute drop in blood pressure. Cough and wheeze are more related to airway or pulmonary issues. Headache can occur with nitroglycerin due to vasodilation, but by itself it’s not a reliable sign of hypotension.